HydroBASINS lev08 watershed · #7080546010
Bassin de Big Walnut Creek
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 7 administrative regions : Delaware, Fairfield, Franklin, Knox, Licking +2
Sub-basin area
1 447,1km²
Upstream area
1 447,1km²
Discharge
18,35m³/s
Mean elev.
296m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- Delaware553.3 km²38.2% of basin
- Franklin515.3 km²35.6% of basin
- 234.8 km²16.2% of basin
- 103.5 km²7.1% of basin
- Knox24.2 km²1.7% of basin
- 11.9 km²0.8% of basin
- 5.7 km²0.4% of basin
30 intersecting protected areas
Gahanna Woods Dedicated
IUCN VNature Preserve
0.42 km² overlap
Cherrybottom Park Coh
IUCN VPark
0.39 km² overlap
Hamilton Road Wetland
IUCN VNature Preserve
0.31 km² overlap
Char-Mar
IUCN VPreserve
0.30 km² overlap
Reserve Program
0.20 km² overlap
Twin Bridges Land Acquisition And
IUCN Not AssignedEasement
0.18 km² overlap
Hogback Ridge
IUCN VPreserve
0.17 km² overlap
Alum Creek South
IUCN VNatural Area
0.17 km² overlap
Parkland
0.17 km² overlap
21 more protected areassorted by overlap area
Parkland
0.17 km² overlap
Taylor Road
IUCN VReserve
0.16 km² overlap
Parkland
0.15 km² overlap
M-Five Parkland
IUCN VParkland
0.14 km² overlap
Refugee Preserve Coh
IUCN VPreserve
0.14 km² overlap
Parkland
0.14 km² overlap
Corridor
0.14 km² overlap
Casto
IUCN VNature Preserve
0.14 km² overlap
Alum Creek
IUCN VNatural Area
0.14 km² overlap
Reserve Program
0.13 km² overlap
Turnberry Parkland
IUCN VParkland
0.13 km² overlap
New Albany
IUCN VNature Preserve
0.13 km² overlap
Three Creeks 17
IUCN Not AssignedConservation Area
0.11 km² overlap
Preserve East Parkland
IUCN VParkland
0.10 km² overlap
Three Creeks 16
IUCN Not AssignedConservation Area
0.10 km² overlap
Odnr NR
IUCN Not AssignedWildlife Area
0.10 km² overlap
Livingston/1-70 Parkland
IUCN VParkland
0.09 km² overlap
Corridor
0.09 km² overlap
Mason Run Parkland Coh
IUCN VParkland
0.08 km² overlap
Three Creeks 15
IUCN Not AssignedConservation Area
0.08 km² overlap
Reserve Program
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 846 distinct species · 2 061 728 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Big Walnut Creek : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,2°C
Annual rain
977mm
Moisture idx (CMI)
-0,08
Runoff
372mm/an
PET
1 058mm
AET
801mm
Mean slope
0,7°
Water table
42cm
Forest
9%
Crops
37%
Urban
33%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)